Fill in the Blank with One of the Words or Phrases

Multiple Choice

Fill in the blank with one of the words or phrases listed below.
- $\mathrm { A } ( \mathrm { n } ) \quad$ ــــــis an expression that can be written as the quotient $\frac { \mathrm { P } } { \mathrm { Q } }$ of two polynomials $\mathrm { P }$ and $\mathrm { Q }$ as long as $Q$ is not 0 .

A) least common denominator
B) rational expression
C) complex fraction
D) equation